Local Orientational Analysis of Helical Filaments and Nematic Director in a Nanoscale Phase Separation Composed of Rod-Like and Bent-Core Liquid Crystals Using Small- and Wide-Angle X-ray Microbeam Sc

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• 作者：Yoichi Takanishi ; Haruhiko Yao ; Takuya Fukasawa ; Kenji Ema ; Youko Ohtsuka ; Yumiko Takahashi ; Jun Yamamoto ; Hideo Takezoe ; Atsuo Iida
• 刊名：Journal of Physical Chemistry B
• 出版年：2014
• 出版时间：April 10, 2014
• 年：2014
• 卷：118
• 期：14
• 页码：3998-4004
• 全文大小：445K
• 年卷期：v.118,no.14(April 10, 2014)
• ISSN：1520-5207

文摘

We analyzed the local nanostructure in binary mixtures of rod- and bent-shaped molecules, n-pentyl-4-cyanobiphenyl (5CB) and 1,3-phenylene bis[4-(4-n-octyloxyphenyliminomethyl) benzoates] (P-8-OPIMB), respectively, using small- and wide-angle X-ray microbeam and macrobeam scattering. From the orientational X-ray scattering patterns, we concluded that the nematic director of 5CB is almost parallel to the smectic layers dominated by bent-core molecules in Bx. Moreover, we observed oriented small-angle diffraction peaks (about 300 脜), which is close to the spacing of 5鈥? layers, and also consistent with the width of a helical nanofilament textures as observed by freeze鈥揻racture transmission electron microscopy. The kinetics in B4 was also discussed based on the contact experimental method.